TABLE 1

Clinical metadata for all subjects in the studya

SubjectNo. of
SCCs
No. of
BCCs
No. of AKs on
left forearm
No. of AKs on
right forearm
No. that regressed
(partially regressed)
No. of SCCs
sampled in
this study
MS0015–205–2011–3011–3001
MS0025–201–430+30+32
MS0041–4011–3011–301 (1)1
MS0055–205–20<1011–3031
MS0061–4030+30+23
MS0071–45–2030+30+11
MS0085–205–2030+30+06
MS0095–201–430+30+01
MS0105–205–2030+30+15
MS01120+1–411–30<1008
MS0121–41–41
MS0131–401
MS0145–201–46
  • a All subjects were immunocompetent men with skin phototype I (pale white skin) and II (fair skin). Mean age at study commencement was 68.3 years (range, 53 to 86 years). AK, actinic keratosis; SCC, cutaneous squamous cell carcinoma; BCC, basal cell carcinoma. Numbers of SCC and BCC refer to total lifetime incidences of keratinocyte carcinoma (formerly called nonmelanoma skin cancer). Numbers of AK (left and right forearms) refer to the number of AKs at study commencement. “No. that regressed” refers to the number of lesions that regressed from AK during the study. No lesions progressed to SCC. The number of SCCs sampled in this study is the number of spontaneously arising SCCs at any body site for which microbiome profiles were obtained.